Brembo 99-05 330i (Excl. xDrive) Rear GT BBK 4 Piston Cast 2pc 345x28 2pc Rotor Drilled-Black

This Brembo GT Big Brake Kit for the rear of your 1999-2005 BMW 330i (excluding xDrive models) includes everything you need to significantly upgrade your braking performance. You get a pair of Brembo's 4-piston GT calipers, two 2-piece 345x28mm rotors that are drilled for heat dissipation, and all the necessary hardware to get them installed. This kit is designed to replace your factory rear brake setup with a much more robust system, offering improved stopping power and fade resistance, especially during spirited driving or track use.

The calipers themselves are cast from aluminum for a good balance of strength and light weight, and they feature a 4-piston design. This means more clamping force is applied to the rotor surface compared to a typical 1 or 2-piston caliper, leading to quicker stops. The 2-piece rotor construction is notable because it separates the rotor friction surface from the hat, which helps manage heat expansion and can reduce the risk of rotor warping over time. The drilled pattern on the rotors helps to vent gases and heat away from the pad surface, maintaining consistent braking performance even under heavy load.

Installing a big brake kit like this is a significant upgrade, and it's often done when a vehicle is used for performance driving or track days where factory brakes can reach their limits. While this kit is designed as a direct replacement for the factory rear brake components on the specified 330i models, it's always a good idea to consult the manufacturer's installation guide for specific details and any required tools or procedures. This kit is a solid choice for BMW owners looking for a substantial improvement in braking feel and capability.